Low Pressure Inlet Check Valve - KMT STREAMLINE S50 Operation And Maintenance Manual

Low Pressure Inlet Check Valve

The inlet check valves should be serviced on a regular, preventive maintenance schedule. Service
is recommended every 1,000 hours. The hard seal end cap must be removed to service the inlet
check valve. Follow the procedure, Hard Seal End Cap Removal. When the end cap has been
removed, proceed with Step 1 below.
Figure 8-11: Low Pressure Inlet Check Valve
1. Use a 5/16-inch wrench or socket to remove the poppet retainer screw. Remove the
retainer and the inlet poppet from the sealing head.
2. Inspect the sealing head for scratches or wear on the cone ring contact surface, and on the
inlet poppet valve contact surface. If defects are detected, the surfaces must be refinished.
See the procedure, Sealing Head Maintenance.
3. Place the inlet poppet in the hole in the poppet retainer as shown below. Position the inlet
poppet and retainer on the sealing head, placing the dowel pin in the appropriate hole in
the sealing head.
Figure 8-12: Inlet Check Valve Installation
There are two holes in the sealing head. The dowel pin on the poppet retainer is
positioned in one and the inlet poppet is positioned over the other. Ensure that the
inlet poppet is positioned over the through hole in the sealing head.
4. Spray Loctite 7649 on the threads of the retainer screw and allow to dry. Apply one drop
of Loctite 242 on the threads only. Do not get any Loctite on the poppet or any other
surfaces on the inlet check valve.
20479291
2-2012/Rev 04
Section 8
High Pressure Water System
8-15